Scientists estimate that there have been at least five mass extinctions in the last 540 million years.
They also believe that we have entered a new extinction event.
Species are becoming extinct at a much faster rate than before.
Instead of astroids or volcanic eruptions, the current event is the result of human activities.
Human activities for example have lead to global warming.
Global warming is the result of an increase in carbon gases in our atmosphere.
These gases trap heat from the sun so the earth is getting warmer.
As a result, sea levels are rising and weather patterns are changing.
In addition ,we humans are destroying the habitats of many plants and animals.
Cutting down forests and polluted rivers destroys the habitats of many forms of life.
There is no longer any doubt that this is happening.
Species of life are disappearing at an increasing rate.
Global temperatures are rising and weather patterns are changing
Scientists are warning us that fast action is necessary to save our future.
If we don’t act we may go the way of the dinosaurs.
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